Ebenezbr barrows



E.. BARROWS.

Hot Air Furnace.

2 Sheets-Sheet 2.

No. 4,301. Patented Dec. 11,1845.

HHIHHHHHHHH [HHHHHHH'HH'H EBENEZER BARROWS, OF NEW YORK, N. Y.

AIR-HEATING FURNACE.

Specification of Letters Patent No. 4,301, dated December 11, 1845.

To all whom it may concern:

Be it known that I, EBENEZER BARROWS, of the city of New York, in theState of New York, have invented certain new and useful Improvements inthe Manner of Constructing Air-Heating Furnaces for the Warming ofBuildings; and I do hereby declarethe following is a full and exactdescription thereof.

The general constructing of my air heating furnace is the same withthose now in use; but I have added thereto an apparatus by means ofwhich, apartments on the same level with that containing the hot airfurnace may have warm air introduced into them without interfering inany degree with the supply that is given to apartments on a higherlevel; the supply of air to be heated and the tubes through which it isconducted into the lower apartment being independent in their action onthe general tubes of conveyance, although heated by the same fire.

I have also made an improvement in the manner of constructing andarranging an evaporating and radiating apparatus, by means of which alarge portion of water may be evaporated and conveyed into the rooms tobe warmed along with the heated air, such evaporation being effectedprincipally by that heat which as such furnaces have been heretoforeconstructed, is allowed to run to waste, it being generally found thatthe air passing from the chimney is in a highly heated state, whileunder my arrangement the amount of waste heat is much reduced.

In the accompanying drawing, Figure 1 is a perspective representation ofmy furnace, separate from the chamber within which it is to becontained. Fig. 2 is a vertical section through its center, and Fig. 3 asection through that part of the air heating chamber which contains theevaporators or radiators.

In each of these figures where the same parts are represented they aredesignated by the same letters of reference.

A is the fire chamber of the furnace, B. the ash-pit and a, a, the gratebars.

C is the body of the furnace above the fire chamber, and D the openingfor feeding the fire, which is closed by a door in the ordinary way.

The castings A, and C, are shown as corrugated for the purpose ofincreasing the radiating surface and of admitting a free expansion andcontraction of these parts.

WVithin the chamber G, of the-furnace I place a large air heatingvessel, or retort E into which cold air is to be admitted from without,for the purpose of being heated, and from which it is to be conductedwhen required to rooms on a level with the furnace chamber.

F, F, are tubes communicating with the external air, and leading intothe retort E. A single tube may if preferred, be used for introducingthe cold air.

G is a tube proceeding from the upper part of the retort for theconveyance and distribution of the air which has been heated therein,which air may be conducted ofi horizontally or otherwise. On the upperpart of the retort E, there is a revolving or other register H, whichmay be opened when the air that is heated in said retort is not requiredto be conveyed through the tube G; it will then commingle with thatinthe general heated air-chamber, and constitute a part thereof.

I is the escape pipe leading immediately I from the furnace, forcarrying off the gaseous products of combustion; this connects with thepipes J J Fig. 3 at J and the portion J" being closed by a damper N thedraft will be through the pipes K, K, in the direction indicated by thearrows and will be conveyed into the chimney at L. When the damper in Jis open the heated air will pass directly to the pipe L. Between thepipes K, K, and resting on the floor of the heated air chamber, are theevapo-rators M, M. I have represented two of these, but one only maysufiice. These evaporators are double vessels the space between themconstituting a portion ofthe flue. I have made the inner vesselsv with acapacity of twenty-five gallons each; but this may be governed ascircumstances and experience may dictate. By placing these evaporatorsat the bottom of the air chamber they are situated below the level ofthe fire, and receive but little direct heat from it by radiation; andthis may be lessened by interposing a screen between them and thefurnace, it being the intention that the heat by which the water isevaporated shall be that which passes between the double vessels, andwhich would otherwise escape by the chimney. It has been found inpractice that at the point of final escape the cooling face serving todeprive the air passing through them of its heat and communicating it tothe air Within the general chamber. Having thus fully described thenature of my improvements in the air heating furnace, What I claim asnew therein, and desire to secure by Letters Patent is- Combining Withsuch a furnace the evaporating and radiating vessels, or vessel M,

arranged, combined and operatingsubstantially'in the manner and for thepurpose herein made known.

EBENEZER BARROWS. Witnesses:

TH0s. P. JONES, EDWIN L. BRUNDAGE.

